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What is the expiration time for 99mTc-Radiopharmaceuticals?

Option 1: 2-4 hours
Option 2: 6-8 hours
Option 3: 12-14 hours
Option 4: 24-26 hours

Answer :

Final answer:

The expiration time for 99mTc-radiopharmaceuticals is typically between 2-4 hours, based on the decay of the radioisotope 99mTc with a half-life of approximately 6 hours. In some cases, the expiration time may be extended to 24-26 hours for specific imaging procedures.

Explanation:

The expiration time for 99mTc-radiopharmaceuticals is typically between 2-4 hours. This means that after 2-4 hours, the radiopharmaceutical will no longer be effective for imaging or diagnostic purposes.

It is important to understand that the expiration time of radiopharmaceuticals is based on the decay of the radioisotope 99mTc. 99mTc has a half-life of approximately 6 hours, which means that after 6 hours, half of the radioisotope will have decayed into a different element. Therefore, after 6 hours, the radiopharmaceutical will be less effective and may not yield accurate results.

In some cases, the expiration time for 99mTc-radiopharmaceuticals may be extended to 24-26 hours for specific imaging procedures, but this is less common and typically reserved for specialized situations.

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